Fig. 4. The number of P. multimicronucleatum cells with extra CVCs as a function of the time after the cells were transferred from their 84 mosmol l^-1 culture medium into different saline solutions with different ionic compositions but with the same overall osmolarity of 84 mosmol l^-1. (A) The K⁺ concentrations were 5.0, 2.0 and 0.1 mmol l^-1, respectively. (B) The Ca²⁺ concentrations were 1.0, 0.25, 0.1 and 0.001 mmol l^-1, respectively. The number is percentage of cells in each population examined. Values are means ± S.D. (N=3).